Meet the engineers.

Our team of certified coaches combines extensive athletic experience and strong academic backgrounds to engineer record-breaking results for our clients. Having been trained in the TCBOOST Sports Performance approach of breaking down sports performance and fitness to its core components, our speed coaching staff will take you through a development plan that will maximize your potential in sports and life. Our coaches are trained to place a heavy emphasis on perfecting movement mechanics throughout our training programs. We understand that possessing great mechanics will result in reduced injury and peak performance. Having competed ourselves at the collegiate or professional level, and having coached athletes for the past 15 years, we are uniquely qualified to help you develop the intangible character traits that will lead to success not only in athletics, but in the arena of life.


Owner, Founder, and Director of Training

Tommy Christian, Owner and Director of Training, is one of the top sports performance coaches in the country. He started his sports performance career at Northwestern University as the Assistant Director of Strength & Conditioning (2000-2002). His role expanded to take over all the speed development duties for the football program and under his first season in this role, the team saw an average decrease in 40 yd times of .15 seconds. Tommy broke off from NU to begin the process of growing TCBOOST in 2002, although he has continued to aid as a contract coach and consultant for NU football ever since. Over the past 15 years, Tommy has trained more than 600 Division 1 athletes, 150 players for the NFL Draft, 4 NFL Pro-Bowl players and over 40 other professional athletes ranging from the NFL, NBA, MLB, WNBA, and Rugby Union. Tommy is the former starting inside linebacker for the Wildcats under Coach Gary Barnett (1992). During his playing career at Northwestern, he was the top Iron Cat point winner for his combination of speed, strength, explosiveness, and stamina. A Certified Strength and Conditioning Specialist (CSCS) with the National Strength and Conditioning Association (NSCA), Tommy also holds the Etcheberry Certification for Tennis. Pairing an extensive athletic background and coaching experience with a degree in engineering, Tommy has a unique analytical approach to developing performance in athletes of all ages.

Call 847-559-2307 or email to book with Tommy.


Director of Coaching

Director of  Adult Fitness

Strength Development Engineer

Steve Breitenstein, Director of Coaching, has been with TCBOOST since 2012. Steve is a Certified Strength and Conditioning Specialist (CSCS), an American Council on Exercise Certified Personal Trainer (ACE-CPT), and ASEP Coaching Certifed. Coach Breitenstein played basketball at McHenry County College before transferring to University of Illinois – Chicago and graduated with a BS in Kinesiology. Steve coached high school and AAU basketball for 6 years. He also was a personal trainer and group fitness instructor at the YMCA for 3 1/2 years. The ages of Steve’s clients have ranged from 8 years old all the way up to 84 years old, demonstrating the ability to truly work with people of all ages and levels. Steve also supervises the weightroom at Glenbrook North High School.

Call 847-559-2307 or email to book with Steve.


Zachery Nauert

Sports Performance Specialist

Attended the University of Illinois-Chicago and received a bachelor’s degree in Kinesiology with a concentration in Exercise Science and Health Promotion. Zack is a Certified Strength and Conditioning Specialist (CSCS). He also played hockey and lacrosse for Evanston High School and was All-State in hockey during the ’09-’10 season. Played one year of hockey for Hebron Academy in Maine, in the Division 1 NEPSIHA league. Played a short stint of lacrosse for Adrian college (D3) before transferring to UIC. Has been coaching youth hockey for 7 years and currently in his 3rd season as the JV head hockey coach at Evanston High School, and going on his 3rd year as a youth lacrosse coach. Currently holds a USA hockey level 4 coach certification and working towards his level 5.

Booking a session is easy. Just click the button below, select the type of session you’d like, and just follow the rest of the easy prompts.

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Conor Deal

Sports Performance Specialist

Conor began as an intern at TCBOOST in 2018.  After excelling at everything we threw at him, he was hired on in the summer of ’18.  He hails from Palatine, IL and attended college at Loyola University of Chicago where he played football on the club team.  He is also a powerlifter and plans to participate in Strongman Competitions. Conor brings an unbridled energy to every session and makes it his mission to connect with each athlete.

Booking a session is easy. Just click the button below, select the type of session you’d like, and just follow the rest of the easy prompts.

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Jonathan Rodriguez

Sports Performance Specialist

Jonathan Rodriguez has been coaching with TCBOOST since August 2015.  He received his undergraduate degree at the University of Wisconsin-Stevens Point in Athletic Training with an emphasis in Strength and Conditioning. Jonathan also has his Master’s degree in Athletic Training from Ohio University, where he was heavily involved in evidence-based research, orthopedic assessment, therapeutic exercise, and strength and conditioning. Jonathan worked with Ohio Valley University’s Women’s volleyball and Men’s basketball team as their strength and conditioning coach. Jonathan has certifications in FMS 2 (Functional Movement Systems), ASTYM (Augmented Soft Tissue Mobilization), and as a Weight Management Assessor. He also currently supervises the weight room at Glenbrook South.

Booking a session is easy. Just click the button below, select the type of session you’d like, and just follow the rest of the easy prompts.

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Erwin Mendoza

Sports Performance Specialist

Erwin Mendoza began coaching at TCBOOST in 2016. He attended the University of Illinois-Chicago where he received his degree in biology. In high school, Erwin was a three year captain of the track and field team and qualified for the IHSA state championships as a member of the 4x400m team.  Erwin has also competed in the United States Powerlifting Federation State Championships where he won first place in the 75kg men’s division in 2016 and the 2017 USPA Chicago Fit Expo Meet where he also finished a first in his division. Erwin is currently working towards a certification as a Certified Strength and Conditioning Specialist (CSCS) and, aside from being an important member of the TCBOOST team, Erwin is also a Physical Therapy Technician at React Physical Therapy.

Booking a session is easy. Just click the button below, select the type of session you’d like, and just follow the rest of the easy prompts.

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Jordan King

Sports Performance Specialist

Jordan has been in the fitness industry for almost a decade.  He sees training as a way to mentor and motivate kids, which is something that he enjoys most and takes pride in.  He is a Certified Personal Trainer and Performance Enhancement Specialist through NASM the National Academy of Sports Medicine.  He is also a Certified Functional Strength Coach (CFSC) and a speed and agility coach through Athletes Acceleration.

Booking a session is easy. Just click the button below, select the type of session you’d like, and just follow the rest of the easy prompts.

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Vicky Junge

Customer Service Specialist

Vicky has been connected to TCBOOST since 2002 when Tommy began training her daughter, Jesse Adler, who was a highly ranked USTA player. Tommy continued to work with Jesse throughout her playing career at New Trier HS & Dartmouth College. Vicky’s daughter Casey, who was a walk-on lacrosse player at Colgate University, credits TCBOOST for getting her ready to compete at the Division I level. In addition, Vicky’s son Jack Junge, who was an individual IHSA State Champion golfer and two-time State hockey champion goalie at New Trier High School, has trained with TCBOOST and gone on to play college golf at Trinity College (CT) where he finished his freshman year as an All-American. Vicky’s husband Roger is the Director of Racquet Sports at Lake Shore Country Club.

Vicky graduated from Northwestern University with a B.S. in Communication and worked as Commercial Banking Vice President before taking a hiatus to raise her children.

After working for several years at the USTA Nielsen Pro Tennis Tournament in Winnetka, Vicky chose to return to the workforce full time and working at TCBOOST seemed the natural fit.